表面接枝胶原蛋白的聚偏氟乙烯膜的研究

利用低温等离子体技术对聚偏氟乙烯(PVDF)膜表面进行改性,并接枝胶原蛋白,研究了胶原蛋白的质量浓度和接枝时间对膜性能的影响.对接枝后的膜材料进行了水通量、接触角、染色性能方面的测试,并利用傅里叶红外光谱对膜表面结构进行研究.研究结果表明,通过等离子体技术在PVDF膜表面成功接枝了胶原蛋白,提高了膜的亲水性能.     

可染聚丙烯纤维高速纺丝研究

以苯乙烯辅助马来酸酐接枝聚丙烯(PP-g-(MAH-co-St)作为相容剂与聚丙烯(PP)、尼龙6(PA6)、改性共聚酯(HCDP)按一定配比共混纺丝，实验表明该共混体系具有良好的相容性。改性聚丙烯纤维的染色性能得到明显改善，可以被分散染料染成深色，并且其抗静电性能明显提高。通过流变性能测试，拟定了主要纺丝工艺，并分析了纺丝温度、纺丝速度、纤维纤度等参数对纤维结构和性能的影响。实现了在高速纺丝条件下制备可染聚丙烯纤维，为工业化生产可染聚丙烯纤维作出了有益的探索。     

改性胶原蛋白施胶剂的制备及其施胶性能研究

以胶原蛋白为基材,丙烯酸甲酯(MA)和乙酸乙烯酯(VA)为接枝单体,过硫酸铵(APS)为引发剂,采用乳液聚合法对胶原蛋白进行改性制备施胶剂。通过单因素实验优化出其较优的制备条件:MA与VA的质量比为1∶2,胶原蛋白与单体的质量比为1∶2,APS用量是单体总质量的0.8%,反应时间为2 h。采用红外光谱仪和激光粒度仪对产物进行了表征,结果表明:胶原蛋白与乙烯基单体之间发生了接枝反应,得到的施胶剂乳液平均粒径为0.117μm,分布均匀。将该产物应用于纸张表面施胶后,发现与未施胶纸张相比,其抗张强度是原纸的3倍,抗撕裂强度是原纸的1.9倍,且耐水性能得到了明显改善。     

可促进神经再生的胶原蛋白中空湿法纺丝成形研究

对牛胶原蛋白的可纺性厦湿法中空成形进行了研究，探讨了胶原蛋白不同的制备工艺参数如pH值、温度、离子强度等对胶原蛋白可纺性的影响，并着重讨论了纺丝速度、填充液压力、致孔剂含量等纺丝工艺参数与胶原中空纤维膜性能厦结构的关系。体外细胞实验的结果表明：该胶原蛋白对神经细胞的生长具有促进作用。     

甲基丙烯酸羟乙酯接枝改性真丝织物的研究

本文以甲基丙烯酸羟乙酯（HEMA）为单体，过硫酸钾为引发剂．对真丝织物进行接枝改性处理。探讨了不同处理条件对接枝效果及其真丝织物性能的影响。研究表明．选用合适的工艺参数对蚕丝织物进行接枝处理，在保持真丝绸原有风格的同时．可获得较好的改性效果。     

可染聚丙烯纤维高速纺丝研究

以苯乙烯辅助马来酸酐接枝聚丙烯(PP—g-(MAH—co—St))为相容剂与聚丙烯(PP)、尼龙6(PA6)、改性共聚酯(HCDP)按一定配比共混纺丝,实验表明该共混体系具有良好的相容性。改性聚丙烯纤维的染色性能得到明显改善,可以被分散染料染成深色,并且其抗静电性能明显提高。通过流变性能测试,拟定了主要纺丝工艺,并分析了纺丝温度、纺丝速度、纤维纤度等参数对纤维结构和性能的影响。实现了在高速纺丝条件下制备可染聚丙烯纤维,为工业化生产可染聚丙烯纤维作出了有益的探索。     

13CNMR法研究乙烯基类单体与胶原蛋白水解多肽的接枝共聚反应

通过比较胶原蛋白丙烯酸水解物、乙烯基类单体均聚物、共聚物及其与多肽接枝共聚物的13CNMR谱图,证明在以过硫酸铵为引发剂时乙烯基类单体确实与胶原蛋白水解多肽发生接枝共聚反应.在δ为69.6～69.8及44.1～44.5处出现接枝共聚特征吸收.并对其反应历程进行推测.     

丙烯酸酯共聚物改性聚氯乙烯（PVC）

综述了丙烯酸酯改性PVC的研究状况和技术进展，对ACR改性的机理及目前取得的研究成果作了概述，并对ACR改性的发展前景进行了分析、结果表明，丙烯酸酯弹性体改性PVC可取得理想的抗冲性能，而化学接枝增韧改性，特别是悬浮聚合体系接枝聚合目前尚处于试验研究阶段．     

L-4型改性蛋白鞣剂的皮革复鞣性能研究

研究了胶原蛋白水解液与乙烯基类单体接枝共聚制备的L-4型改性蛋白鞣剂对皮革的复鞣填充性能.发现该鞣剂兼顾了胶原蛋白多肽链的柔软性和乙烯基类树脂的填充性,经其加工的皮革柔软性和增厚率有明显改善,这表明鞣剂分子能渗透到原胶原分子之间,撑开并分散胶原纤维.     

丙烯酸树脂改性硅氧烷聚合物的研究──一种新型涂料型采光涂层粘结剂

文章对带有羟基的丙烯酸树脂改性硅聚合物粘结剂进行了研究，通过选择适当的实验条件使它们接枝共聚，同时研究了不同因素对它们的影响．改性后的粘结剂，与颜料的相容性好，其红外辐射率较未改性的硅氧烷辐射率有较大辐度的降低，光学等性能优异，是一种新型太阳光谱选择性吸收涂层的粘结剂．     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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